Software Version:   Compaq Fortran Version 7.4B or later

Compaq Computer Corporation
Houston, Texas

Compaq shall not be liable for technical or editorial errors or omissions contained herein. The information in this document is provided "as is" without warranty of any kind and is subject to change without notice. The warranties for Compaq products are set forth in the express limited warranty statements accompanying such products. Nothing herein should be construed as constituting an additional warranty.

Contents

This manual provides information about the documentation for Compaq® Fortran (formerly DEC® Fortran^tm 90 and DIGITAL^tm Fortran 90) on Compaq OpenVMS^tm Alpha systems. It also provides information about documentation for Compaq Fortran 77 (formerly DEC Fortran and DIGITAL Fortran 77).

Compaq Fortran is a multiplatform product available on the following platforms (operating system/processor architecture pairs):

Operating System	Processor	Compaq Fortran Product Name
OpenVMS	Alpha	Compaq Fortran for OpenVMS Alpha Systems
OpenVMS	VAX®	Compaq Fortran 77 for OpenVMS VAX Systems 1
Compaq Tru64 tm UNIX®	Alpha	Compaq Fortran for Tru64 UNIX Systems
Linux®	Alpha	Compaq Fortran for Linux Alpha Systems
Windows 2000, NT, Me, 98, 95	x86	Compaq Visual Fortran, Standard, Professional, or Enterprise Edition

Product Terminology

This document uses the following new or changed product name terminology:

• "Compaq Fortran" or "Compaq Fortran 95/90" refers to the product that was previously called DIGITAL Fortran 90 and DEC Fortran 90.
• "Compaq Fortran 77" refers to the product that was previously called DEC Fortran and DIGITAL Fortran 77.
• "Compaq Fortran" also refers to the combined packaging of the Compaq Fortran and Compaq Fortran 77 products.
  Both Compaq Fortran compilers recognize the Product Authorization Key (PAK) for either Compaq Fortran or Compaq Fortran 77. For example, if you have a Compaq Fortran 77 PAK, you can begin using the Compaq Fortran compiler.

Compaq Fortran Web page

If you have Internet access and a Web browser, you are welcome to view:

• The Compaq Fortran home page, which provides a wealth of information about Compaq Fortran products and updates on all platforms. To access this page, open the following Internet URL:

  http://www.compaq.com/fortran

• The Compaq Math Library home page, which provides a wealth of information about Compaq Extended Math Library (CXML) and the Compaq Portable Math Library (CPML), including information and updates for all platforms. To access this page, open the following Internet URL:

  http://www.compaq.com/math

• The Compaq Computer Corporation home page, located at the following URL:

  http://www.compaq.com

Locating Compaq Fortran Documentation on CD-ROM

Installation-related Compaq Fortran documentation is available online on the Software Product Library media CD-ROM set.

The Software Product Library CD-ROM set contains the kit installation files and related documentation in ASCII and PostScript® form, for Compaq Fortran, Compaq Fortran 77, and other OpenVMS Alpha layered products. This documentation includes the Compaq Fortran installation guide, cover (read before installing) letter, and Software Product Description (SPD).

The Online Documentation Library CD-ROM set contains documentation files in HTML or Bookreader format for Compaq Fortran, Compaq Fortran 77, and other OpenVMS Alpha layered products.

To determine whether the appropriate media CD-ROM is already mounted on your system, contact the appropriate system manager.

To obtain the location of the Compaq Fortran kit and documentation directories on the appropriate media CD-ROM, do one of the following:

• Use the cdmenu utility provided on the media CD-ROM
• View the CD master index file in the [README] directory on the first CD-ROM

Contents of this Chapter:

The sections in this chapter:

• Describe Online Release Notes and the Help File ( Section 1.1)
• Describe Compaq Fortran 95/90 documentation and online information ( Section 1.2)
• Describe Compaq Fortran 77 documentation and online information ( Section 1.3)
• Describe how to order printed documentation ( Section 1.4)
• List known Compaq Fortran documentation corrections ( Section 1.5)
• Describe how to send comments on Compaq Fortran documentation ( Section 1.6)

The following Compaq Fortran online information is available (once installed on the system):

• Compaq Fortran online release notes
  Provide more information on this version of Compaq Fortran, including known problems.
  To display or print the Compaq Fortran release notes before installing, use the PRODUCT EXTRACT RELEASE_NOTES FORTRAN command (see the Compaq Fortran Installation Guide for OpenVMS Alpha Systems).
  Once installed, the ASCII version of the online release notes are located in:

  SYS$HELP:FORTRAN.RELEASE_NOTES

  
  Other forms of the release notes (PostScript) are also provided, using the file name:

  SYS$HELP:FORTRAN_RELEASE_NOTES.PS

  
  The Compaq Extended Math Library (CXML) release notes are also available after installation, using the (wildcard) file name:

  SYS$HELP:CXML*notes.TXT

• Compaq Fortran online help
  The Compaq Fortran HELP module in SYS$HELP:HELPLIB.HLB provides online access to Compaq Fortran and Compaq Fortran 77 help, including descriptions of FORTRAN command qualifiers, a summary of the language elements (statements, intrinsic procedures, and so on), error message descriptions, and other information.
  To view the online Compaq Fortran help file using the HELP command, type:

  $ HELP FORTRAN

  
  You can specify topics to navigate the help hierarchy. For example:

  $ HELP FORTRAN /ALIGN

The Compaq Fortran Installation Guide for OpenVMS Alpha Systems, the "read first" cover letter, and the SPD are available on the OpenVMS Alpha Software Product Library CD-ROM in ASCII and PostScript format.

All Compaq Fortran 95/90 documents except the cover letter, SPD, and the release notes are available on the Online Documentation Library CD-ROM in HTML form.

1.2 Compaq Fortran 95/90 Documentation and Online Information

Except for this online documentation overview and the "read before installing" cover letter, the Compaq Fortran 95/90 documentation has not changed since Version 7.4. The Compaq Fortran 95/90 documentation set includes the following:

• Compaq Fortran Language Reference Manual (AA-Q66SD-TK)
  Describes the Compaq Fortran source language for reference purposes, including the format and use of statements, intrinsic procedures, and other language elements. It also provides an overview of new Fortran 90 and 95 features (not available in FORTRAN-77).
  It identifies extensions to the Fortran 95 standard by blue-green color in the printed document.
  This document is included with the Compaq Fortran document kit, QA-MV1AA-GZ and is on the Online Documentation Library CD-ROM in HTML form.
• Compaq Fortran User Manual for OpenVMS Alpha Systems (AA-QJRWC-TE)
  Describes the Compaq Fortran program development and run-time environment on OpenVMS Alpha systems. It describes compiling, linking, running, and debugging Compaq Fortran programs, performance guidelines, run-time I/O and error-handling support, data types, numeric data conversion, calling other procedures, and compatibility with Compaq Fortran 77.
  This document is included with the Compaq Fortran document kit, QA-MV1AA-GZ and is on the Online Documentation Library CD-ROM in HTML form.
• Compaq Fortran Installation Guide for OpenVMS Alpha Systems (AA-PU3AF-TE)
  Explains how to install Compaq Fortran and the Compaq Extended Math Library (CXML) on an OpenVMS Alpha system, including requirements.
  The installation guide is included with the Compaq Fortran document kit, QA-MV1AA-GZ. It is also included in ASCII and PostScript form on the Software Product Library CD-ROM and is on the Online Documentation Library CD-ROM in HTML form.
• Compaq Extended Math Library Documentation
  Describes the Compaq Extended Math Library (CXML, formerly DIGITAL Extended Math Library or DXML), a collection of high-performance subprograms that perform different types of mathematical operations, including:
  • Matrix computations
  • Signal processing code
  • Code to solve sparse linear systems using direct and iterative methods
  
  The CXML online documentation and the CXML release notes are installed on the users system (in SYS$HELP:CXML*) and the cxmlref-vms.pdf and .ps files are located in the Compaq Fortran 95/90 directory on CD-ROM.
• Read Before Installing or Using Compaq Fortran Version 7.4B for OpenVMS Alpha Systems (AV-PU3BN-TE)
  This cover letter contains information about installing Compaq Fortran that may not be included in the installation guide or in the release notes.
  This cover letter is included with the Compaq Fortran document kit, QA-MV1AA-GZ. It is also included on the Software Product Library CD-ROM in ASCII and PostScript form.

The Compaq Fortran Software Product Description (SPD) is provided on the Software Product Library CD-ROM.

1.3 Compaq Fortran 77 Documentation and Online Information

Except for this online documentation overview and the "read before installing" cover letter, the Compaq Fortran 77 documentation has not changed since Version 7.4. The Compaq Fortran 77 documentation set includes the following:

• DEC Fortran Language Reference Manual (AA-PU45B-TK)
  Describes the Compaq Fortran 77 source language for reference purposes, including the format and use of statements, intrinsic procedures, and other language elements.
  It identifies extensions to the Fortran 77 standard by blue-green color in the printed document and by shading in Bookreader. When using Bookreader Version 4.0, note that the shading of extensions may be inaccurate.
  This document is included with the Compaq Fortran 77 document kit, QA-MV1AB-GZ and is on the Online Documentation Library CD-ROM in Bookreader and HTML form.
• DEC Fortran User Manual for OpenVMS AXP Systems (AA-PU39A-TE)
  Describes the Compaq Fortran 77 program development and run-time environment on OpenVMS Alpha systems. It describes compiling, linking, running, and debugging Compaq Fortran 77 programs, performance guidelines, run-time I/O and error-handling support, data types, numeric data conversion, calling other procedures, and compatibility with Compaq Fortran on other platforms.
  This document is included with the Compaq Fortran 77 document kit, QA-MV1AB-GZ and is on the Online Documentation Library CD-ROM in Bookreader form.
• Compaq Fortran Installation Guide for OpenVMS Alpha Systems (AA-PU3AF-TE)
  Explains how to install Compaq Fortran and the Compaq Extended Math Library (CXML) on an OpenVMS Alpha system, including requirements.
  The installation guide is included with the Compaq Fortran document kit, QA-MV1AA-GZ. It is also included in ASCII and PostScript form on the Software Product Library CD-ROM and is on the Online Documentation Library CD-ROM in HTML form.
• Compaq Extended Math Library Documentation
  Describes the Compaq Extended Math Library (CXML, formerly DIGITAL Extended Math Library or DXML), a collection of high-performance subprograms that perform different types of mathematical operations, including:
  • Matrix computations
  • Signal processing code
  • Code to solve sparse linear systems using direct and iterative methods
  
  The CXML online documentation and the CXML release notes are installed on the users system (in SYS$HELP:CXML*).
• Read Before Installing or Using Compaq Fortran Version 7.4B for OpenVMS Alpha Systems (AV-PU3BN-TE)
  This cover letter contains information about installing Compaq Fortran that may not be included in the installation guide or in the release notes.
  This cover letter is included with the Compaq Fortran document kit, QA-MV1AA-GZ. It is also included on the Software Product Library CD-ROM in ASCII and PostScript form.

The Compaq Fortran Software Product Description (SPD) is provided on the Software Product Library CD-ROM.

1.4 Ordering Printed Documentation

To order the complete printed Compaq Fortran 95/90 for OpenVMS Alpha Systems documentation set from Compaq, specify the order number QA-MV1AA-GZ. The individual Compaq Fortran 95/90 documents are listed in Section 1.2.

To order the complete printed Compaq Fortran 77 for Compaq OpenVMS Alpha Systems documentation set from Compaq, specify the order number QA-MV1AB-GZ. The individual Compaq Fortran 77 documents are listed in Section 1.3.

To order printed documentation from Compaq, see the "How to Order Additional Documentation" page in the back of a recently printed Compaq software document or use these guidelines:

• In the U.S.A., phone 1-800-344-4825
• In other countries, contact your local Compaq Subsidiary or reseller.

This section contains information that does not appear in the Compaq Fortran 95/90 documentation:

• Compaq Fortran Language Reference Manual
  No known corrections apply to this manual. For information on new language features, see the online release notes.
• Compaq Fortran User Manual for OpenVMS Alpha Systems
  No known corrections apply to this manual.
• Compaq Fortran Installation Guide for OpenVMS Alpha Systems
  No known corrections apply to the this guide.

Compaq welcomes your comments on any Compaq Fortran manual or online information. You can send comments to Compaq by Internet e-mail to:

fortran@compaq.com

For the latest product information, please see the Compaq Fortran Web page (see Compaq Fortran Web page at beginning of this chapter).

Contents